I noticed something on I believe Kaspersky's threatpost site about a 3D rendering thing being dangerous. It seems that entering about:config into the address line and hitting enter gets you into some internal settings in Firefox where you could change (and mess up) a lot of settings. I looked at mine and some of the settings are not default but "owner selected". I wonder if Spybot Immunize changed some of the settings in the interest of security?
On the Kaspersky site it tells how to turn off the 3D thing or webgl or whatever it is that may open a vulnerability. Perhaps Spybot can make an update turn off this 3D thing during immunization or something.